/*
 * jngc, Java utility classes by Nicholas Coltharp
 * Copyright (C) 2010 Nicholas Coltharp <ngc1@rice.edu>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package edu.rice.ngc1.util.function;

/**
 * Abstract base class for objects that represent functions with
 * arguments.
 * 
 * @param <P>
 *            the object's parameter type
 * @param <R>
 *            the object's return type
 * @param <E>
 *            type of exception that may be thrown
 */
public interface Executable<P, R, E extends Throwable> {

    /**
     * Performs some operation and returns a result.
     * 
     * @param arg
     *            the parameter to this operation
     * @return the result of the operation
     * @throws Exception
     *             if an error occurs
     */
    public R exec(P arg) throws E;
}
